EP1391609A1 - Appareil de dosage avec une bague hydraulique - Google Patents
Appareil de dosage avec une bague hydraulique Download PDFInfo
- Publication number
- EP1391609A1 EP1391609A1 EP02018660A EP02018660A EP1391609A1 EP 1391609 A1 EP1391609 A1 EP 1391609A1 EP 02018660 A EP02018660 A EP 02018660A EP 02018660 A EP02018660 A EP 02018660A EP 1391609 A1 EP1391609 A1 EP 1391609A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid passage
- section
- metering device
- valve
- valve needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 4
- 239000012858 resilient material Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003763 resistance to breakage Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/02—Engines characterised by air compression and subsequent fuel addition with positive ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
Definitions
- the present invention relates to a metering device for dosing pressurized fluids, particularly an injection valve for a fuel injection system in an internal combustion engine.
- the metering device is of the type which comprises a valve body containing a fluid passage for the pressurized fluid to be dosed, the fluid passage terminating with a metering opening, an axially moveable valve needle passing through the fluid passage, the valve needle having a first end inside the fluid passage, controlling the opening and closing of the metering opening, and having a second end inside an actuator chamber, the second end cooperating with an actuator assembly in the actuator chamber controlling the axial movement of the needle, wherein in operation the pressure in the actuator chamber is smaller than the pressure in the fluid passage, and a bushing element for the valve needle, hydraulically isolating the actuator chamber and the fluid passage.
- Such a metering device is disclosed for example in the European Patent application EP 1 046 809 A2.
- EP 1 046 809 A2 In the manufacture of piezoelectric actuator-controlled valves for high-pressure direct injection for gasoline engines, it is essential to provide a hydraulic seal capable of isolating the space through which the pressurized gasoline travels from that containing the abovementioned actuator.
- the sealing element is formed by a metal bellows with the top and bottom collars attached to the injector needle and the valve body, respectively.
- a metal bellows offers a high mechanical elasticity in the direction of movement of the needle, a sufficient resistance to fuel pressures of up to 500 bar, and a high reliability with respect to leakage throughout the required temperature range of -40 °C to +150 °C.
- an injector valve with a metal bellows has disadvantages of high component manufacturing costs and a complex assembly, requiring two hermetic welds.
- the bushing element is formed by an elastic element, hermetically fastened to the valve needle and to the valve body.
- the elastic element comprises a metal element having first and second fastening sections for fastening the metal element to the valve needle and to the valve body, respectively, and a bendable conical section connecting the first and second fastening sections. Bending the conical section allows the valve needle to move axially in its seat by the required amount to start the fuel injection.
- the first fastening section is formed by a hollow cylinder section in hermetic contact with the valve needle
- the second fastening section is formed by a ring section in hermetic contact with the valve body, wherein the inner diameter of the ring section is larger than the diameter of the hollow cylinder section.
- the elastic element may further comprise a ring of a resilient material, such as rubber, arranged in contact with the bendable conical section, thereby increasing the stiffness of the elastic element.
- the ring is capable of damping the forces produced by the pressure peaks of the gasoline in this region of the valve body, which may otherwise amount to up to ⁇ 30% of the expected pressure level of 200 bar.
- the ring of resilient material has a trapezoidal cross section, as it then allows a tight fit with the conical section of the metal element.
- the invention provides a remarkable reduction in the costs of the bushing element.
- the manufacture can easily be integrated in current assembly and welding procedures and the components used can straightforwardly be adapted to mass production.
- Figure 1 illustrates the lower part of an injection valve 10 for direct-injection gasoline engines, according to a specific embodiment of the invention.
- the valve body 12 contains an outlet passage 20 for the pressurized fluid which terminates with a metering opening 16.
- a valve needle 22 is disposed axially slidable in the outlet passage 20. In the closed state of the injection valve, a mushroom-shaped plunger 24 on a first end of the needle 22 is pressed against the valve seat 14 and closes the metering opening 16.
- an elastic element 30 and 38 hydraulically isolates the actuator chamber 40 and the outlet passage 20 from each other.
- the elastic element comprises a metal element 30 and a rubber ring 38 with trapezoidal cross section.
- the metal element 30 consists of a hollow cylinder section 32, forming a first fastening section, a ring section 36, forming a second fastening section and a bendable conical section 34, connecting the two fastening sections 32 and 36.
- the metal element 30 is hermetically fastened to the valve needle 22 with the first fastening section 32 and to the valve body 12 with the second fastening section 36.
- the conical part 34 of the metal element is designed to be able to bend to such a degree that the needle can move axially in its seat up to 100 ⁇ m, which gives rise to the flow of gasoline into the combustion chamber of the engine cylinder.
- the trapezoidal shape of the rubber ring 38 is chosen to tightly fit onto the conical section 34, conferring greater stiffness thereto.
- the rubber ring 38 has further the effect of damping the forces produced by the pressure peaks of the gasoline in this region of the valve body 12, which otherwise may be as large as ⁇ 30% at a pressure level of 200 bar.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60204454T DE60204454T2 (de) | 2002-08-20 | 2002-08-20 | Dosiervorrichtung mit hydraulischem Ring |
EP02018660A EP1391609B1 (fr) | 2002-08-20 | 2002-08-20 | Appareil de dosage avec une bague hydraulique |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02018660A EP1391609B1 (fr) | 2002-08-20 | 2002-08-20 | Appareil de dosage avec une bague hydraulique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1391609A1 true EP1391609A1 (fr) | 2004-02-25 |
EP1391609B1 EP1391609B1 (fr) | 2005-06-01 |
Family
ID=30775820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02018660A Expired - Fee Related EP1391609B1 (fr) | 2002-08-20 | 2002-08-20 | Appareil de dosage avec une bague hydraulique |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1391609B1 (fr) |
DE (1) | DE60204454T2 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1795741A1 (fr) * | 2005-12-06 | 2007-06-13 | Siemens Aktiengesellschaft | Dispositif d'aiguille |
EP1808596A1 (fr) * | 2006-01-12 | 2007-07-18 | Siemens Aktiengesellschaft | Assemblage de soupape pour un injecteur et l'injecteur |
DE102014221630A1 (de) | 2014-10-24 | 2016-04-28 | Robert Bosch Gmbh | Injektor zur Dosierung eines Fluids in eine Leitung |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2032005A1 (de) * | 1970-06-29 | 1972-01-05 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzventil |
GB2332035A (en) * | 1997-12-08 | 1999-06-09 | Caterpillar Inc | Fluid seal in a plunger and barrel assembly |
EP1046809A2 (fr) | 1999-04-20 | 2000-10-25 | Siemens Aktiengesellschaft | Dispositif de dosage d'un fluide |
EP1106817A2 (fr) * | 1999-12-06 | 2001-06-13 | Siemens Aktiengesellschaft | Soupape à géométrie de butée améliorée |
DE19956830A1 (de) * | 1999-11-25 | 2001-06-21 | Siemens Ag | Durchführung |
DE10054182A1 (de) * | 2000-11-02 | 2002-05-29 | Siemens Ag | Fluiddosiervorrichtung mit Drosselstelle |
-
2002
- 2002-08-20 DE DE60204454T patent/DE60204454T2/de not_active Expired - Lifetime
- 2002-08-20 EP EP02018660A patent/EP1391609B1/fr not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2032005A1 (de) * | 1970-06-29 | 1972-01-05 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzventil |
GB2332035A (en) * | 1997-12-08 | 1999-06-09 | Caterpillar Inc | Fluid seal in a plunger and barrel assembly |
EP1046809A2 (fr) | 1999-04-20 | 2000-10-25 | Siemens Aktiengesellschaft | Dispositif de dosage d'un fluide |
DE19956830A1 (de) * | 1999-11-25 | 2001-06-21 | Siemens Ag | Durchführung |
EP1106817A2 (fr) * | 1999-12-06 | 2001-06-13 | Siemens Aktiengesellschaft | Soupape à géométrie de butée améliorée |
DE10054182A1 (de) * | 2000-11-02 | 2002-05-29 | Siemens Ag | Fluiddosiervorrichtung mit Drosselstelle |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1795741A1 (fr) * | 2005-12-06 | 2007-06-13 | Siemens Aktiengesellschaft | Dispositif d'aiguille |
EP1808596A1 (fr) * | 2006-01-12 | 2007-07-18 | Siemens Aktiengesellschaft | Assemblage de soupape pour un injecteur et l'injecteur |
DE102014221630A1 (de) | 2014-10-24 | 2016-04-28 | Robert Bosch Gmbh | Injektor zur Dosierung eines Fluids in eine Leitung |
Also Published As
Publication number | Publication date |
---|---|
DE60204454T2 (de) | 2006-05-04 |
EP1391609B1 (fr) | 2005-06-01 |
DE60204454D1 (de) | 2005-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20040031862A1 (en) | Fuel injector | |
US7183695B2 (en) | Piezoelectric actuator module, and method for assembling a piezoelectric actuator module | |
US6932278B2 (en) | Fuel injection valve | |
EP1391609A1 (fr) | Appareil de dosage avec une bague hydraulique | |
US6899284B1 (en) | Fuel-injection valve | |
JP4499250B2 (ja) | 燃料噴射弁 | |
JP4163962B2 (ja) | 圧電式のアクチュエータモジュール | |
US6637677B1 (en) | Fuel injector | |
US20060289682A1 (en) | Fuel-injection valve | |
US6840459B1 (en) | Fuel injection valve | |
EP1813805A1 (fr) | Ensemble de compensation pour un injecteur | |
EP1445473B1 (fr) | Dispositif de dosage avec joint dynamique | |
US7422006B2 (en) | Fuel injector | |
EP1445480B1 (fr) | Dispositif de dosage avec joint d'étanchéité dynamique | |
JP4537401B2 (ja) | 液体の制御のための弁 | |
US20040046060A1 (en) | Fuel injection valve | |
EP1445472B1 (fr) | Dispositif de dosage avec joint dynamique | |
JP4253590B2 (ja) | 燃料噴射弁 | |
EP1445478B1 (fr) | Elément d'étanchéité et aiguille de soupape pour un dispositif de dosage | |
EP1391608B1 (fr) | Doseur avec unité de compensation thermique | |
EP1808596A1 (fr) | Assemblage de soupape pour un injecteur et l'injecteur | |
US7896263B2 (en) | Fluid injector | |
JP7435211B2 (ja) | エンジン構造 | |
EP2067981B1 (fr) | Ensemble de vanne pour soupape d'injection, et soupape d'injection | |
EP3816431B1 (fr) | Injecteur de fluide pour moteur à combustion interne comprenant un élément compensateur de pression |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20030804 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
17Q | First examination report despatched |
Effective date: 20040216 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
AKX | Designation fees paid |
Designated state(s): DE FR IT |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR IT |
|
REF | Corresponds to: |
Ref document number: 60204454 Country of ref document: DE Date of ref document: 20050707 Kind code of ref document: P |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
ET | Fr: translation filed | ||
26N | No opposition filed |
Effective date: 20060302 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20190822 Year of fee payment: 18 Ref country code: IT Payment date: 20190829 Year of fee payment: 18 Ref country code: DE Payment date: 20190831 Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 60204454 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210302 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200831 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200820 |